N-methyl-2-pyrrolidone → Phthalic Anhydride

HRID 1769214Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1769214
CN1C(=O)CCC1.[OH-].[Na+].Cl[C:11]1[CH:12]=[C:13]([C:20]([O-:22])=[O:21])[C:14](=[CH:18][CH:19]=1)[C:15]([OH:17])=O.[Na+]>[Ti].O>[C:20]1(=[O:21])[O:22][C:15](=[O:17])[C:14]2=[CH:18][CH:19]=[CH:11][CH:12]=[C:13]12

Komponenten

6

Edukt 3

HCID 13387N-methyl-2-pyrrolidoneHCID 14798Sodium HydroxideHCID 2724244Sodium Hydrogen 4-Chlorophthalate

Produkt 1

HCID 6811Phthalic Anhydride

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 23963TitaniumKatalysatorHCID 962WaterLösungsmittel2×

Reaktionsbedingungen

Temperatur
250 °C

Versuchsvorschrift

A titanium-lined autoclave was charged with 108 g of a poly(phenylene sulfide) (melt viscosity: 2800 poises) produced by Kureha Chemical Industry Co., Ltd., 500 g of NMP, 7 g of sodium hydroxide, 8.43 g (0.05 mole as S content) of hydrated sodium sulfide and 8.8 g of water. After the autoclave being purged with nitrogen gas, the contents were gradually heated up to 250° C. to react them for 30 minutes, thereby depolymerizing the poly(phenylene sulfide). Thereafter, the contents were cooled to room temperature. Then, 17.8 g (0.08 mole) of sodium hydrogen 4-chlorophthalate and 48.6 g of water were added to the autoclave, and the contents were heated up to 255° C. to react them for 2 hours.

Aufarbeitung

  1. customproduced by Kureha Chemical Industry Co
  2. customAfter the autoclave being purged with nitrogen gas
  3. customto react them for 30 minutes
  4. temperatureThereafter, the contents were cooled to room temperature
  5. temperaturethe contents were heated up to 255° C.
  6. customto react them for 2 hours

Quellen und Nachweise

ORD-Eintrag
ord-d7a85ea8ae024aa38b42ae7e87dc0aad
Quelldatensatz
uspto-grants-1995_01
Patentnummer
US05380819

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